Other common name: Veronica. If so, at what ratio should it be applied? Description of Speedwell (Veronica officinalis): Speedwell, also known as Veronica, is a perennial herb that has bluish flowers. Would Gordons Trimec Classic Broadleaf Herbicide work on veronica speedwell in a northern lawn? Home & Garden Blog. There are approximately 500 species of speedwell. Speedwell began to disappear. Concentrate (2) Ready-to-Spray Hose End Sprayer (3) Ready-to-Use (6) Granules (1) Treatment Area. Corn speedwell, also called rock speedwell or wall speedwell, is a common weed of home lawns, parks, institutional grounds, and other turf areas in Pennsylvania. 10 days after I gave the lawn my normal short mow, raking , scarifying, over seeding and fertilising treatment. Corn speedwell is one of the most prevalent of the weedy species, others include: Germander, Persian, Creeping, Purslane and Ivyleaf. Speedwell Weed Killer Veronica officinalis Herbicide. Solution Type. Slender speedwell is a low growing weed, that will happily tolerate even the lowest mowing heights. How well does QuinKill Max Crabgrass and Weed Killer work on winter bluegrass plus broadleaf weeds? Selective weedkiller containing Dicamba or Mecoprop, treat in March or April, add a little detergent to solution to aid wetting. Winter Annual Weeds. Follow these links for further … After 10 days I applied 2x strength Resolva lawn weedkiller. Typically, winter annual weed seeds germinate in the fall and grow throughout the "warmer" days of winter. The weeds will take over a lawn with a thick bed of leaves that will sprout pale blue and white colored flowers. So far the lawn is free of any sign of germander speedwell. This species can be found growing in moist or dry soils, in full sun or shade, and where turf is thin. Get free shipping on qualified Speedwell Ortho Weed Killer or Buy Online Pick Up in Store today in the Outdoors department. You'll notice them growing in the early spring and into summer. Speedwell rarely reproduces from seed as it is a self pollinating plant. Speedwell Solution; Filter By. How To Kill And Prevent The Re-Growth Of Corn Speedwell Weeds In Your Lawn. Slender speedwell, field woodrush and mind-your-own-business are resistant to weedkillers Many weeds need more than one application of weedkiller Always follow the instructions on the weedkiller for the best results Make sure you use the right product: some are ineffective on specific weeds Weedy lawns can be turned into wildflower meadows Corn speedwell weeds are common throughout the United States. In a few years, it can spread from a few patches to cover the entire lawn. This is a small annual weed which is commonly found in crops and gardens throughout the year as it can germinate in both spring and autumn. It spreads by producing both overground (stolons) and underground (rhizomes) runners that root at the nodes. 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